cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A094806 Number of (s(0), s(1), ..., s(2n)) such that 0 < s(i) < 8 and |s(i) - s(i-1)| = 1 for i = 1,2,...,2n, s(0) = 1, s(2n) = 5.

Table of values

n a(n)
2 1
3 5
4 20
5 74
6 264
7 924
8 3200
9 11016
10 37792
11 129392
12 442496
13 1512224
14 5165952
15 17643456
16 60250112
17 205729920
18 702452224
19 2398414592
20 8188884992
21 27958972928
22 95458646016
23 325917686784
24 1112755552256
25 3799191029760
26 12971261403136
27 44286680330240

List of values

[1, 5, 20, 74, 264, 924, 3200, 11016, 37792, 129392, 442496, 1512224, 5165952, 17643456, 60250112, 205729920, 702452224, 2398414592, 8188884992, 27958972928, 95458646016, 325917686784, 1112755552256, 3799191029760, 12971261403136, 44286680330240]